Quote:
Originally Posted by Mike1261
That's my thought too. It's a 3.0i motor and the vehicle has been horribly neglected by past owners. That said, I don't really know how you can neglect a differential that doesn't require maintenance for at least 100k miles, so I'm hoping it's something I can at least prolong for a while.
Is there any benefit to going with 75w140 if it does happen to be bearings? Or would 75w90 suffice?
And I don't have access to a new drain plug or o-rings where I am. Will I have leak problems by reusing the original? Or should be it ok?
Thanks!
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It's only a WAG on my part but I'm thinking the 75w-90 should be fine. At least then you know the fluid is right and good.
Don't need new drain plugs etc. - I've changed both diffs and transfer case (transfer case uses BMW power divider oil, not ATF) and never replaced the plugs etc. - zero issues.
Noise
might not be diff as the driveshaft centre bearing (CSB) sometime makes a similar noise. Sounds like a diff though, from the fact it changes under deceleration....